A couple of questions were raised on HW #3.
For problem 1, please use the 3 period forecast for 2014 as the basis for calculating the EOQ and all other calculations.
For question number 4, please assume a 90% service level. This would result in a z scale value of 1.28.
So the formula = (demand over reorder period AND lead time) +(1.28*standard deviation of demand over reorder period AND lead time)